High-resolution electron microscopy studies of antiphase boundaries in Cu3Au

Potez, L.; Loiseau, Annick

doi:10.1007/bf00188822

Cited by 20 publications

(19 citation statements)

References 13 publications

(16 reference statements)

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“…= 17 [001] twist boundary in Cu3Au for T/T~ = 0, 0.8 and 0.9.It is remarkable that the wetting occurs 100 K below the transition temperature. Experimental results for the wetting of the surface[24], and very recently on the antiphase boundaries in Cu3Au[13] agree with the present results. A word of caution is appropriate.…”

supporting

confidence: 82%

“…In addition some experimental investigations are concentrated on its internal boundaries. High-resolusion electron microscope measurements show that the antiphase boundaries wet at temperatures some 100 K below the order-disorder transition temperature [13]. Theoretically the Cu3Au system has been studied since long ago, using the Ising model with pair interactions up to second neighbors [14].…”

Section: Introductionmentioning

confidence: 99%

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[001] Twist boundaries in Cu3Au for T ? 0 K

Polatoglou

1994

Interface Sci

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Four different [001] twist boundaries in Cu3Au spanning a wide range of the rotation angle are investigated for temperatures below the bulk order-disorder transition temperature. All the boundaries show almost identical behavior for the plane averaged stoichiometry and the order parameter at a given temperature. Within the accuracy of the calculations no segregation of either Cu or Au is observed to the boundary. At the boundary and below the transition temperature there is a layer which is more disordered than the rest of the crystal, and its width increases as the bulk order-disorder transition temperature is approached. This indicates wetting phenomena, which are in agreement with the experimental and theoretical results on other boundaries.

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supporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

[001] Twist boundaries in Cu3Au for T ? 0 K

Polatoglou

1994

Interface Sci

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“…In that case, the APBs are oriented in such a way that there are conservative ͑i.e., the local stoichiometry is preserved͒ and of low energy. 53 Similarly, one could expect for the Fe 3 O 4 thin film that APBs are aligned along directions of low energy.…”

Section: B Angular Analysismentioning

confidence: 95%

Characterization of antiphase boundary network inFe3O4(111)epitaxial thin films: Effect on anomalous magnetic behavior

et al. 2006

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We report on the antiphase boundaries network of Fe 3 O 4 ͑111͒ thin films. 5-to 50-nm-thick samples were epitaxially grown by molecular beam epitaxy onto ␣-Al 2 O 3 ͑0001͒ substrates. The magnetic properties of the samples have been interpreted within the framework of a one-dimensional model of antiphase boundary ͑APB͒, which predicts that the magnetization is given by M ϱ ͑1−b / ͱ H͒ in the approach to saturation regime. Transmission electron micrographs of several samples were used to extract the statistical parameters of the APB network, particular emphasis being put on the relevance and statistical significance of the studied parameters. The mean antiphase domain size D , as the antiphase boundaries characteristic length l 0 extracted from a fractal analysis, vary as the square root of film thickness/deposition time and are within the 10 nm range. The APB density was found to vary as 1 / l 0 as expected from the fractal dimensions of the network. The dependency of the b parameter of the magnetic model on the APB density is finally analyzed in the light of micromagnetic simulations of chains including finite size antiphase domains and two APBs.

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“…The very same behavior was observed by electron microscopy for bulk APB's. 16,17 The characteristic surface domain size ⌳ was measured for each annealing time. At least 10 images ͑102.4 nm ϫ102.4 nm͒ like those shown in Fig.…”

Section: A Equilibrium Structurementioning

confidence: 99%

“…15 ͑2͒ For Cu-Pd͑17%͒, bulk APB's exhibit no strong preferential orientation 13 whereas APB's of Cu 3 Au are predominantly oriented in the low-index ͕001͖ planes. 16,17 This difference can be related to the different ratio between first-and second-nearest-neighbor interactions. When the nearestneighbor interaction is dominant, conservative APB's ͑for which the number of A and B nearest-neighbor atoms is con-served͒ have a low creation energy and faceting of APB's along ͕001͖ planes results.…”

Section: Introductionmentioning

confidence: 99%

Chemical ordering of alloy surfaces: Low-index versus vicinal surfaces

et al. 2001

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Some A 3 B fcc alloys undergo a chemical order-disorder phase transition. During the ordering process, four types of domain appear within the bulk, separated by antiphase boundaries ͑APB's͒. As for chemical ordering in the presence of a surface, scanning tunneling microscopy and He diffraction studies consistently show a contrasting behavior between vicinals, where APB's emerge at the surface, and low-index surfaces, where no APB's emerge. These differences emphasize the role of the step density in surface chemical ordering.

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High-resolution electron microscopy studies of antiphase boundaries in Cu3Au

Cited by 20 publications

References 13 publications

[001] Twist boundaries in Cu3Au for T ? 0 K

[001] Twist boundaries in Cu3Au for T ? 0 K

Characterization of antiphase boundary network inFe3O4(111)epitaxial thin films: Effect on anomalous magnetic behavior

Chemical ordering of alloy surfaces: Low-index versus vicinal surfaces

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